SmogRank / Countries / Japan / Saitama

Most polluted cities in Saitama, Japan

30 measured cities, last 7 days; 0 above the WHO 24-hour guideline. Worst: Niiza at 7.8 µg/m³, #947 in the world.

30 good

  1. 1Niiza 7.8
  2. 2Kawaguchi 7.7
  3. 3Gyōda 7.7
  4. 4Misato, Saitama 7.6
  5. 5Asaka 7.4
  6. 6Sōka 7.3
  7. 7Kazo 7.3
  8. 8Ageo 7.2
  9. 9Higashi-Matsuyama 7.2
  10. 10Menuma 7.1
  11. 11Kukichūō 7.1
  12. 12Koshigaya 7.1
  13. 13Igusa 7.0
  14. 14Saitama 7.0
  15. 15Kōnosu 6.9
  16. 16Hanyū 6.6
  17. 17Kodamachō-kodamaminami 6.5
  18. 18Honjō 6.5
  19. 19Kawagoe 6.4
  20. 20Sakado 6.3
  21. 21Kumagaya 6.2
  22. 22Kasukabe 6.2
  23. 23Yorii 6.1
  24. 24Morohongō 5.8
  25. 25Sayama 5.8
  26. 26Iruma 5.5
  27. 27Chichibu 5.4
  28. 28Hannō 5.3
  29. 29Tokorozawa 5.1
  30. 30Ogawamachi 4.1
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+

Estimated: cities without a monitor

Saitama cities we can't measure, with model estimates for the last 7 days. Listed by population, not ranked: estimates aren't precise enough to rank. Model estimates from the Copernicus Atmosphere Monitoring Service (CAMS), adjusted to measured cities nearby where there are any. Adjusted, a single day lands within ×1.5 of what a monitor would read about two times in three; unadjusted, it can be off by half or double. Treat them as a guide, not a measurement.

City7-day estimateBand
Shimotoda≈ 8 µg/m³Good
Fujimino≈ 8 µg/m³Good
Iwatsuki≈ 8 µg/m³Good
Yono≈ 8 µg/m³Good
Yashio≈ 5 µg/m³Good
Wako≈ 10 µg/m³Moderate
Shiki≈ 8 µg/m³Good
Warabi≈ 8 µg/m³Good
Okegawa≈ 8 µg/m³Good
Yoshikawa≈ 5 µg/m³Good
Tsurugashima≈ 8 µg/m³Good
Kitamoto≈ 8 µg/m³Good
Hasuda≈ 8 µg/m³Good
Hidaka≈ 6 µg/m³Good
Satte≈ 8 µg/m³Good
Hatogaya-honchō≈ 8 µg/m³Good
Kamifukuoka≈ 8 µg/m³Good
Shiraoka≈ 8 µg/m³Good
Ōi≈ 8 µg/m³Good
Shinden≈ 8 µg/m³Good
Sugito≈ 8 µg/m³Good
Miyoshidai≈ 8 µg/m³Good
Washinomiya≈ 8 µg/m³Good
Ishigami≈ 6 µg/m³Good
Matsubushi≈ 5 µg/m³Good
Fukiage-fujimi≈ 8 µg/m³Good
Kurihashi≈ 8 µg/m³Good
Shōbu≈ 8 µg/m³Good
Kisai≈ 8 µg/m³Good
Yamata≈ 6 µg/m³Good
Ōgushi≈ 8 µg/m³Good
Ranzan≈ 6 µg/m³Good
Sashiōgi≈ 8 µg/m³Good

Updated 2026-10-01 20:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.